In my opinion, Dennett's definition of a zombie as " physically identical to a normal human being, but completely lacks conscious experience." is quit silly, and obviously absurd (i.e. falsified) for most people, as many here have pointed out.  So discussing such is a complete waste of time, and most people will justifiably not take you seriously.

Material Property Dualism predicts a different kind of zombie is possible.  To best understand what such would be like let me describe the following.  Let's imagine someone has an 'out of body experience' (or maybe a drug induced phenomenal trip) where they experience a color they've never experienced before in their life.  Let's say they call this color grue.

Even though you and I can talk very intelligently about grue, until you have experienced that color, you are a grue 'zombie'.  At least until we discover the neural correlate of such, and then can reliably reproduce the same in our brain - then we'll not longer be a grue zombie.  And clearly, the neurons that are enabling you to talk about grue intelligently, before you experience it aren't anything like the neural correlate that are responsible for true grue - so whatever it is - surely it is very physically distinquishable.

fundamental dualistic 'quale' or quality information can't be represented 'abstractly', unless you know how to property interpret it - back to the directly experienced original.  Abstracted knowledge, such as the word grue, doesn't matter what is representing it, as long as you know how to map it back to it's intended meaning.  However, absent such proper interpretation - abstracted information is zombiesh.  Given the right interpretation, it can do and behave, any way you want it to, and whatever is representing it - even if it is phenomenally like something (maybe we incorrectly think of it as being some kind of green blue until we experience the real thing), doesn't matter, again, unless you know how to properly interpret it.

OH, and I don't think you were a zombie, just because you can't remember doing the things you did under anesthesia.  I predict Quale had to be a big part of all that - even though you just don't remember such.  True zombies can remember the word grue, and talk about such, even if they haven't yet experienced true grue.  No memory is required, you just have to be able to experience grue, together with redness, greenness... and know that grue is not anything like all those qualities.

Brent Allsop